Find the energy of the following. Express your answers in units of electron volts, noting that 1 eV 1.60 x 1019 J. (a) a photon having a frequency of 2.30 x 1017 Hz (b) a photon having a wavelength of 2.50 x 102 nm

Find the energy (in ev) of a photon with a frequency of 8.3 × 1016 Hz. ev

An x-ray source generates EM radiation with a wavelength of 45.0 pm (10-12 m). h =       c =     qelectron = e = 1.602x10-19  C,    ke = 8.99x109 N·m2/C2, What is the energy associated with this x-ray wave? What potential difference must be applied to the electrons in the x-ray tube to produce this x-ray? The air gap in the x-ray tube is 30.0 μ How much charge must be present on the plates to create this potential difference for a single electron? What is the force on a single electron when it is at 30.0 μm from the positive plate?

Find the energy of the following. Express your answers in units of electron volts, noting that 1 ev = 1.60 x 10-19 j. (a) a photon having a frequency of 4.60 x 1017 Hz ev (b) a photon having a wavelength of 5.40 x 102 nm ev

A laser emits 6.85 x 1018 photons per second in a thin beam with circular cross section having diameter 1.2 mm.  The wavelength of the photons is 514.5 nm. What is the laser output power? (enter your answer with 3 significant figures)

Alarm systems use the photoelectric effect. A beam of light strikes a piece of metal in the photocell,ejecting electrons continuously and causing a small electric current to flow. When someone steps into thelight beam, the current is interrupted, and the alarm is triggered.An alarm system uses 100. g of a metal in the photocell. You know that the metal is one of 3 possiblemetals whose work functions are known. If you shine a violet laser (405 nm) on the photocell, you detect acurrent. If you shine a green laser (532 nm) on the photocell, you do not detect a current.Metal                              Work function (J)Potassium                      3.69 x 10-19Sodium                           4.19 x 10-19Aluminum                       6.54 x 10-19(a) Which metal is being used in the photocell? How do you know? (b) What is the velocity of the detected electrons? (c) Do you expect to detect a current if you increase the intensity of the green laser? Why? (d) Draw an energy level diagram…

A light source is used in a photoelectric experiment. The metal copper is illuminated, if a stopping potential of 1.03 V is required, what is the energy of the light shining on the metal in eV? Answer to FIVE decimal places. Do NOT enter units. Use and carry ALL your digits of your calculator. Metal #Metal o (eV) 1 Ag 4.73 Al 4.08 Cu 4.70 4 Fe 4.50 Na 2.46 6. Pb 4.14 Pt 6.35 Zn 4.31 our Answer:

What is the wavelength (in m) of a 2.06 eV photon? Find its frequency in hertz.

A hydrogen atom, initially at rest, absorbs an ultraviolet photon with a wavelength of λ = 169.8 nm. ▼ Part A What is the atom's final speed if it now emits an identical photon in a direction that is perpendicular to the direction of motion of the original photon? Express your answer to three significant figures and include appropriate units. .0 Value Submit ΜΑ Part B Units Request Answer μA What is the atom's final speed if it now emits an identical photon in a direction that is opposite to the direction of motion of the original photon? Express your answer to three significant figures and include appropriate units. ? Q Search P Pearson Copyright © 2022 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us | ט 7:22 12/11/2

An electron is bound to a region of space by a springlike force with natural frequency 04.082 x 10¹5 rad/s. a) Find the ground state energy of this electron. Give your answer in units of eV. b) Suppose the electron absorbs a photon and jumps from the ground state to the first excited state. What is the wavelength of the photon? Give your answer in units of nm.